The term “retrofit” is most often used to describe
exhaust aftertreatment devices. While exhaust aftertreatment
technology represents a very promising category of solutions
for in-use emissions reduction, it is only one of a number
of options. In addition to cleaner fuel use and idle reduction
technologies and practices, here are some other opportunities
to reduce diesel emissions:
Repair/Rebuild—Regular
engine maintenance plays a critical role in ensuring
proper engine performance and engine rebuilding can significantly
lower emissions in some cases.
Retrofit—The
installation of exhaust aftertreatment technologies -
such as particulate filters, oxidation catalysts, exhaust
gas recirculation (EGR), selective catalytic reduction (SCR)
devices, and NOx catalysts - can reduce emissions of particulate
matter (PM) and nitrogen oxides (NOx).
Repower—Replacing
the older engine with a new clean diesel engine can be
a cost-effective option for certain highly-valuable pieces
of diesel equipment.
Replace—Replacing
entire vehicles or equipment may be the best, most cost-effective
option for some of the oldest engines.
